Four Pairs of Copper Cable
Number of twists varies per inch
No shielding
Very easy to work with 100
Ohm, 24AWG
◦ Solid for horizontal and stranded for patch cable
◦ Most susceptible to
Electromagnetic Interference
(EMI)
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Why copper?
◦ High quality
◦ Well understood
◦ High speeds (upto 10G
Ethernet)
◦ Easy to work with
◦ Equipment supporting copper is less expensive
11
10
Defined in 2008
500 MHz bandwidth
9
RG-58C/U
50 ohm/20AWG
End of life
RG-59/U
75 ohm/20AWG
CATV
RG-6/U
75 ohm/18AWG
HDTV, satellite, cable modem
Copyright 2012, ITT ESI
Defined in 2002
250 MHz bandwidth
Cat 6A
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Defined in 1999
100 MHz bandwidth
Cat 6
8
Cat 5e
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Why not?
◦ Susceptible to EMI and RFI
◦ Eavesdropping difficult to detect ◦ Higher speeds available on other media
◦ Copper is a precious metal and cost will increase as supply diminishes Copyright 2012, ITT ESI
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2
4/7/2014
Best Practices for Installation
Tone and Probe
◦ Tone generator applies power to one end of a cable ◦ Signal can be detected by the amplifier probe when in close proximity of the wire ◦ Used to identify one cable out of several
◦ Have a plan!
◦ Follow standards
◦ Do not exceed distance limits: horizontal max 90m and patch cable max 5m at each end
◦ Be careful not to stretch cable when pulling – use lubrication, if necessary
◦ Be careful to not exceed bend radius
◦ UTP should cross electrical cables at 90 degrees and never run in parallel
◦ Properly support cables
◦ Keep the job neat: get referrals and easy servicing
◦ Test all circuits
◦ Document everything
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13
Copyright 2012, ITT ESI
Wire-Map Testers
◦ Used to detect wiring errors or broken cables
◦ Performs end to end continuity test on each wire ◦ Necessary to provide cable certification
